Perhaps you should try some spelling variations:
wang xiaoping » wang xiaodong, deng xiaoping, wang xiaolin
xiaoping tan » xiaoyang tang, xiaojing a, xiaoping _
tan cheng » tang zheng, yuan cheng, tan hong
cheng wei » chen wei, cheng hei, cheng siwei
wei ying » wei ming, wei yang, wei yiming
jin data » main data, own data, can data
von data » loan data, von daten, von daf

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang xiaoping tan cheng wei ying ((jin data) or (von data)) (hai or hari) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang xiaoping tan cheng wei ying ((jin data) OR (von data)) (hai OR hari) ;*.